1. Look, choose to carefully observe the reflection on the surface of bathroom products from the side under strong light. It is better to have no or few sand holes and bumps on the surface. Products with high brightness indicators use high-quality glazed materials and excellent glazing techniques, which result in good light reflectivity and visual effects.
  
2. To touch, you can gently rub the surface with your hand, and it feels very smooth and delicate. You can also touch the back and feel a slight "rustling" friction sensation.
  
3. Listen, you can tap the ceramic surface with your hand. Generally, good ceramic materials produce a crisp sound when struck.
  
4. The comparison mainly tests the water absorption rate, and the lower the water absorption rate, the better. Ceramic products have a certain adsorption and permeation ability for water. If water is sucked into the ceramic, it will cause certain expansion, which can easily cause the glaze surface of the ceramic to crack due to expansion.